Dansensor® ISM-3 EN User Manual 23
P/N 200114-I
09/2021
The display shows:
er.30
Hardware error. The
mains supply line
failure signal is
constantly high
Switch off ISM-3, wait for 10 seconds and
switch it on again. If an error is still
indicated, ISM-3 should be returned for
repair.
It is possible to continue by pressing .
However, the mains supply unit is
defective and should be replaced /
repaired (possibly a bad wire connection).
The display shows:
er.31
The last time ISM-3 was
switched off, the line
failure signal from the
mains supply unit was
not detected. If this
error occurs in
connection with each
start, there is a
hardware error
Switch off ISM-3, wait for ten seconds and
switch it on again. If an error is still
indicated, ISM-3 should be returned for
repair.
It is possible to continue by pressing .
However, the mains supply unit is
defective and should be replaced /
repaired (possibly a bad wire connection).
The display shows:
er.32
Errors in the oxygen
sensor calibration data.
The checksum does not
match.
The calibration data and the offset
adjustment is reset and stored in the Flash
memory. Calibrate the device.
The display shows:
er.33
Errors in one of or more
of the set-up values
All set-up values are changed to factory
settings. Please check the values in the
set-up menu and the set- up of the alarm
limit values
al.HI and al.Lo.
The display shows:
er.34
Errors in the flow
sensor calibration data.
Switch off the ISM-3 and wait 10 seconds
and switch on again. Press if there is still
an error message. The readout of flow
might be erroneous.
Eventually send ISM-3 for repair
The display shows:
er.50
Hardware error. Check
sum error in the
EPROM containing all
program code
Switch off ISM-3, wait for 10 seconds and
switch it on again. If an error is still
indicated, ISM-3 must be returned for
repair.
The display shows:
er.51
Hardware error.
Furnace thermo
element alarm. Thermo
element switched off
Switch off ISM-3, wait for 10 seconds and
switch it on again. If an error is still
indicated, ISM-3 must be returned for
repair.
The display shows:
er.52
Cannot reach stable
heating temperature.
Fluctuates more than
±30°C
Switch the ISM-3 off and wait 10 seconds
and then switch on again. If message of
error is still given, ISM-3 must be returned
for repair.
Problem Possible cause Possible solution
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